Jewel from the Tower of Jewels, an exhibit at the Panama Pacific International Exhibition, held in San Francisco in 1915, courtesy of Donna Ewald Huggins. Ms. Huggins has the largest PPIE collection known.

Jewel from the Tower of Jewels, an exhibit at the Panama Pacific...

Jewel from the Tower of Jewels, an exhibit at the Panama Pacific... Photo-4320519.58356 - SFGate

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Vintage items from the Panama Pacific International Exhibition, held in San Francisco in 1915, courtesy of Donna Ewald Huggins. Ms. Huggins has the largest PPIE collection known.